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# I18n Pluralization are useful when you want your application to
# customize pluralization rules.
#
# To enable locale specific pluralizations you can simply include the
# Pluralization module to the Simple backend - or whatever other backend you
# are using.
#
# I18n::Backend::Simple.include(I18n::Backend::Pluralization)
#
# You also need to make sure to provide pluralization algorithms to the
# backend, i.e. include them to your I18n.load_path accordingly.
module I18n
module Backend
module Pluralization
# Overwrites the Base backend translate method so that it will check the
# translation meta data space (:i18n) for a locale specific pluralization
# rule and use it to pluralize the given entry. I.e. the library expects
# pluralization rules to be stored at I18n.t(:'i18n.plural.rule')
#
# Pluralization rules are expected to respond to #call(count) and
# return a pluralization key. Valid keys depend on the translation data
# hash (entry) but it is generally recommended to follow CLDR's style,
# i.e., return one of the keys :zero, :one, :few, :many, :other.
#
# The :zero key is always picked directly when count equals 0 AND the
# translation data has the key :zero. This way translators are free to
# either pick a special :zero translation even for languages where the
# pluralizer does not return a :zero key.
def pluralize(locale, entry, count)
return entry unless entry.is_a?(Hash) and count
pluralizer = pluralizer(locale)
if pluralizer.respond_to?(:call)
key = count == 0 && entry.has_key?(:zero) ? :zero : pluralizer.call(count)
raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
entry[key]
else
super
end
end
protected
def pluralizers
@pluralizers ||= {}
end
def pluralizer(locale)
pluralizers[locale] ||= I18n.t(:'i18n.plural.rule', :locale => locale, :resolve => false)
end
end
end
end
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